Question

What molar quantity is associated with a `130*kg` mass of water?

And what mass is associated with `1.82*mol` of `"sulfur dioxide"`?

And what mass is associated with `0.0482*mol` of `CH_2Cl_2`?

Answer 1

We use the quotient.....`"Mass"/"Molar mass"="Number of moles..."`

Explanation:

And so for `"water"` we gots....

`(130*kgxx10^3*g*kg^-1)/(18.011*g*mol^-1)=7218.2*mol`

And for `"nitrous oxide"` we gots....

`(4.6*g)/(44.01*g*mol^-1)=??*mol`

And for `"sulfur dioxide"` we gots....

`1.82*molxx64.07*g*mol^-1=??*g`

And for `"methylene chloride"` we gots....

`0.0484*molxx84.93*g*mol^-1=??*g`

Do you see what I have done with the quotient?